Data Structure Exercises

Practice exercises for lists, dictionaries, and sets: removing duplicates, frequency counting, finding majority element, list rotation, merging dictionaries, grouping, intersection, and anagrams.

Key Exercises

1. Remove Duplicates: Use set for seen elements
2. Frequency Count: dict.get(key, 0) + 1
3. List Rotation: Slicing lst[-k:] + lst[:-k]
4. Anagrams: sorted(s1) == sorted(s2)

Tips

• Use set for uniqueness operations
• dict.get() avoids KeyError
• Handle empty collections